Use the properties of powers. In this case, you can combine powers with the same base, by simply adding the exponents.
x8 or x15
racist
3 to the fifth power is 3 x 3 x 3 x 3 x 3 = 243.
23 x 32 = 72
2 x 2 x 2 x a x a x a x b x b
5 to the third power means 5 x 5 x 5(five times five times five). The answer to five to the power of three (also 5x5x5) equals 53 which equals 625.
(x^3)(x^5)=x^8
x squared
gcf 18x to the 3rd power and 30 x to the fifth power
10^5 means 10x10x10x10x10. 10^3 means 10x10x10. Multiplying them together is 10x10x10x10x10 x 10x10x10 which is 10^8. In general, x^a times x^b is x^(a+b).
x to the ninth power OR x to the 9th power OR x^9
Simply multiply 5 x 5 x 5. The answer is 125.
Two raised to the fifth power equates to 25 or2 x 2 x 2 x 2 x 2 or 32
racist
In this case, you can use a single power, with "x" as the base, and add the exponents,
(4 x 10 )3 = 64,000 4 x 103 = 4000. It depends if the question is 4 times -----10 to the third power or 4 times ten ----- to the third power.
5 to the fifth power simply means five multiplied by itself 5 times (5 x 5 x 5 x 5 x 5).
2.1x1010 (30,000 x 700,000)